Factorization and Green dyadics for a new class of bi-anisotropic media using duality

In this paper we will study the Green dyadics and the factorization of the Helmholtz determinant operator for a new class of homogeneous bianisotropic media. That new class of media is derived from previously studied media us ing a rotational duality transformation. The new class of media is very gen eral and contains many other, previously studied classes, as special cases. The Green dyadics are expressed in a form that contains a one-dimensional inverse Fourier transformation that, in general, cannot be evaluated in clo sed form.